The critically-acclaimed American String Quartet and UNCSA artist-faculty Oskar Espina-Ruiz, clarinet, perform Brahms’ Clarinet Quintet and Schubert’s String Quartet No. 14, “Death and the Maiden,” in a memorial concert that will honor Louise Quantock Watson, mother of William R. Watson, friend of the School of Music. 7:30 p.m. at Watson Hall.